US2658086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bromination of polyhalomethanes
Assignee: Dow Chemical Co
•
Filing: 1952-07-02
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Granted: 1953-11-03
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Expires: 1972-07-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
- 👤 Ralph A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:30
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD OF BROMINATING POLYHALOMETHANES WHICH COMPRISES CONTACTING IN A HEATED ZONE AT A REACTION TEMPERATURE IN THE RANGE OF 200* TO 500* C. FOR A TIME SUFFICIENTLY LONG TO EFFECT REACTION, A POLYHALOMETHANE CONTAINING AT LEAST ONE HYDROGEN, AT LEAST ONE FLUORINE, AND NO IODINE WITH A MIXTURE OF BROMINE AND CHLORINE IN A MOL RATIO OF BROMINE TO CHLORINE GREATER THAN 0.7:1.
Claim 2
Independent Claim
64 words
A METHOD OF BROMINATING POLYHALOMETHANES WHICH COMPRISES CONTACTING IN A HEATED ZONE AT A REACTION TEMPERATURE IN THE RANGE OF 200* TO 500* C. FOR A TIME SUFFICIENTLY LONG TO EFFECT REACTION, A POLYHALOMETHANE CONTAINING AT LEAST ONE HYDROGEN, AT LEAST ONE FLUORINE, AND NO IODINE WITH A MIXTURE OF BROMINE AND CHLORINE IN A MOL RATIO OF BROMINE TO CHLORINE GREATER THAN 0.7:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |